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City of Pleasanton Recycled Water Project CEQA Addendum • An impact is considered less than significant if the analysis concludes that the impact would cause no substantial adverse change to the environment and that accordingly it would not require mitigation. • An impact is considered less than significant with mitigation incorporated if the analysis concludes that, with the inclusion of mitigation measures to which the project proponent has agreed,the impact would cause no substantial adverse change to the environment. • An impact is considered potentially significant if the analysis concludes that the impact exceeds applicable regulatory thresholds of significance and cannot be reduced to a less-than-significant level with potentially feasible mitigation. In assessing the impacts of the proposed alignment changes to the project as originally approved, the City is not assessing whether impacts are significant compared with existing physical conditions (i.e., conditions without implementation of any part of the project). Rather, the City is assessing how the incremental impacts, if any, associated with the proposed pipeline alignment changes compare with the impacts disclosed in the IS/MND. This approach is expressly sanctioned by the governing statutory and regulatory provisions and case law. (See Public Resources Code, § 21166; CEQA Guidelines, § 15162; Bowman v. City of Petaluma (1986) 185 Cal.App.3d 1065, 1078-1082; Temecula Band of Luiseno Mission Indians v. Rancho Cal. Water Dist. (1996)43 Cal.App.4th,425,438-439). 1.4 Organization of this Document CEQA Guidelines do not specify the format of addendums. The content and format of this Addendum is as follows. • Chapter 1, "Introduction," identifies the purpose, terminology, and organization of the Addendum. • Chapter 2, "Description of Proposed Project Change," identifies the proposed project refinements in detail. • Chapter 3, "Environmental Analysis," presents the analysis for each component of the project change. This chapter identifies the proposed project change's impacts in relevant resource categories. • Chapter 4, "Conclusion," summarizes the conclusions of the environmental review in this Addendum. • Chapter 5, "List of Preparers," identifies the individuals involved in preparing this Addendum and their areas of technical specialty. • December 2014 1-4